import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

class hehei {
	static private double a, b, c;
    public static void main( String[] sss){
	try {
		InputStream in=System.in;
		InputStreamReader inRead=new InputStreamReader(in);
		BufferedReader read=new BufferedReader(inRead);
		System.out.println("输入三边值，每个值输入后回车");
		a=Double.valueOf(read.readLine());
		b=Double.valueOf(read.readLine());
		c=Double.valueOf(read.readLine());
	}
	catch(IOException e){
		System.out.println("出现异常!");System.exit(0);
	}
	if(a<1 ||a>100 || b<1 || b>100||c<1 ||c>100){
		System.out.println("出现异常!");
	}
	else{
		if(a+b<c || a+c<b || b+c<a){
			System.out.println("你输入的不能构成三角形");
		}
		else if(a==b || a==c || b==c){
			if(a==b && b==c) 
				System.out.println("是等边");
			else System.out.println("是等腰");
		}
		else System.out.println("—般的三角形");}
	}
}